Version 0.32.2 of `rust-bitcoin` deprecates a number of methods that
are commonly used in this project, most visibly `txid()`, which is
now called `compute_txid()`. This resulted in a lot of warnings, and
this commit is part of a series that seeks to address that.
... which requires a bunch of unnecessary dev dependencies, e.g., `zip`.
Instead we lean on the `download_bitcoind_electrs.sh` script also for
local testing.
Bitcoin Core's Merkle tree implementation has no way to discern between
internal and leaf node entries. As a consequence it is susceptible to an
attacker injecting additional transactions by crafting 64-byte
transactions matching an inner Merkle node's hash (see
https://web.archive.org/web/20240329003521/https://bitslog.com/2018/06/09/leaf-node-weakness-in-bitcoin-merkle-tree-design/).
To protect against this (highly unlikely attack vector), we check that
the transaction isn't 64 bytes in length, and skip it otherwise.
The `rust-bitcoin` project is working towards making the public API
separate from the directory structure; eventually the
`bitcoin::blockdata` will go away, to make maintenance easier here stop
using the `blockdata` module.
Do not run the formatter, so as to make review easier. This patch was
created mechanically using:
search-and-replace bitcoin::blockdata bitcoin
and having defined
```bash
search-and-replace () {
if (($# != 2))
then
echo "Usage: $0 <this> <that>"
return
fi
local this="$1"
local that="$2"
for file in $(git grep -l "$this")
do
perl -pi -e "s/$this/$that/g" "$file"
done
}
```
We previously upstreamed the `validate_merkle_proof` utility method,
which shipped with `electrum-client` 0.19.0.
Since we upgraded to that version recently, we can now drop our local
code and use the upstreamed version.
This uses the newly introduced conditional configuration checks that are
now configurable withint Cargo (beta).
This allows us to get rid of our custom python script that checks for
expected features and cfgs.
This does introduce a warning regarding the unknown lint in Cargo
versions prior to the current beta, but since these are not rustc errors,
they won't break any builds with the "-D warnings" RUSTFLAG.
Moving to this lint actually exposed the "strict" feature not being
present in the lightning-invoice crate, as our python script didnt
correctly parse the cfg_attr where it appeared.
.. the bindings branch needed a small patch as it doesn't support `dyn`
traits. Here, we opt to use `Deref` in the hopes this works with
bindings, rendering the patch unnecessary.
Previously, we would just push to the `confirmed_txs` `Vec`, leading to
redundant `Confirm::transactions_confirmed` calls, especially now that
we re-confirm previously disconnected spends.
Here, we ensure that we don't push additional `ConfirmedTx` entries if
already one with matching `Txid` is present. This not only gets rid of
the spurious `transactions_confirmed` calls (which are harmless), but
more importantly saves us from issuing unnecessary network calls, which
improves latency.
Previously, we would track a spending transaction but wouldn't account
for it being reorged out of the chain, in which case we wouldn't monitor
the `WatchedOutput`s until they'd be reloaded on restart.
Here, we keep any `WatchedOutput`s around until their spends are
sufficiently confirmed and only prune them after `ANTI_REORG_DELAY`.
.. as the `electrsd` crate doesn't support it.
While we previously did so in our CI script, we now also `cfg`-gate the
tests and dependencies for easier handling.
A previous commit introduced the `time` feature to gate the use of
`SystemTime` dependent APIs in `EsploraSyncClient`. It however omitted
doing the same for the Electrum side of things. Here, we address this
oversight.
Previously, we used the auto-download feature of the
`electrsd`/`bitcoind` crates. While convenient, they unnecessarily
introduced a lot of dependecies (`zip`, `zstd`, `time`, etc.) to our
test environment which needed pinning for the MSRV of 1.63.
Here, we introduce a new `no_download` config flag to the
`lightning-transaction-sync` crate allowing us to disable this
auto-download feature in CI, where we now opt to download the
corresponding binaries manually. We keep the default-auto-download as a
convenience feature for running tests locally though.
We give some more information while reducing the log levels to make the
logging less spammy.
We also convert one safe-to-unwrap case from returning an error to
unwrapping the value.
